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Here, we delineate a comprehensive abundance analysis of four $r$-processenhanced metal-poor stars observed with HORuS spectrograph on a 10-m classtelescope, GTC. The high signal-to-noise ratio at $R \approx 25000$ spectralresolution allowed us to detect 16 light and 20 neutron-capture elements alongwith Th in two stars. Four of our program stars show signatures of mixing intheir atmosphere. Through detailed abundance analysis of four $r$-processenhanced stars together with already identified $r$-process-rich stars inliterature, we probe the production sites of neutron-capture elements. The[Zr/Eu] ratio as a function of metallicity shows the evidence of multiplechannels for the production of $r$-process. Thorium to first and second$r$-process peak elements ratios also support the similar non-universality ofneutron-capture elements. An increased sample of $r$-process enhanced starswill enable us understand different formation channels of neutron captureelements. Using the kinematic analysis, we found the clues of accretion for twoof our program stars.

Chemodynamic analysis of four $r$-process enhanced stars observed with GTC